Open AccessReproductive strategy of spiny gurnard Lepidotrigla dieuzeidei Blanc and Hureau, 1973 from the south-eastern Adriatic Sea
Author(s) -
Tatjana Dobroslavić,
Alexis Conides,
Jadranka Sulić Šprem,
Бранко Гламузіна,
Vlasta Bartulović
Publication year - 2021
Publication title -
acta adriatica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.372
H-Index - 21
eISSN - 1846-0453
pISSN - 0001-5113
DOI - 10.32582/aa.62.1.3
Subject(s) - gonadosomatic index , fecundity , biology , reproductive biology , sex ratio , population , zoology , allometry , reproductive cycle , fish <actinopterygii> , fishery , reproduction , ecology , demography , embryo , sociology , embryogenesis
This study provides the first data on the reproductive biology of the spiny gurnard Lepidotrigla dieuzeidei. A total of 1027 individuals were collected monthly from September 2011 to August 2012. The total lengthof the individuals in the sample ranged from 7.46 cm to 14.62 cm with a female to male ratio of 1 to 0.59. Positive allometric growth was observed for both females (b=3.07) and males (b=3.08). Variations of condition factor were similar in both sexes withmean values of 1.07 for females and 1.01 for males. The fish L. dieuzeidei had a long spawning period extending from November to July based on monthly values of gonadosomatic index. Histological analysis showed that this fish was multiple synchronous developments of ovaries with multiple spawning events. The ovaries were always represented with agroup of primary oocytes and a diverse population of vitel-logenic oocytes, each specially recruited during the final stages of maturation in uniform or uneven phases. Batch fecundity was estimated gravimetrically using the hydrated oocyte method and was estimated to be around 558 to 10.230 oocytes per female. L. dieuzeidei is an important by-catch species and data from this study represent a valuable contribution to stock management.